Patents by Inventor Taras Grigoryevich Pokhil
Taras Grigoryevich Pokhil has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10783907Abstract: A reader includes a free layer and a side shield that biases the free layer. The side shield includes a main bias layer having a first magnetic moment value and a first magnetization direction. The side shield also includes a compensation bias layer having a second magnetic moment value that is less than the first magnetic moment value and a second magnetization direction that is opposite to the first magnetization direction.Type: GrantFiled: September 4, 2019Date of Patent: September 22, 2020Assignee: SEAGATE TECHNOLOGY LLCInventors: Victor Sapozhnikov, Taras Grigoryevich Pokhil, Mohammed Shariat Ullah Patwari, Shaun Eric McKinlay
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Patent number: 9153251Abstract: An apparatus comprising a base shield, a sensor stack, and a base seed layer separating the base shield from the sensor stack. The base seed layer has a base coupled seed section that is coupled with the base shield, and a base uncoupled seed section that is uncoupled with the base shield, wherein the base uncoupled seed section covers a base window surrounding the sensor stack.Type: GrantFiled: March 3, 2015Date of Patent: October 6, 2015Assignee: SEAGATE TECHNOLOGY LLCInventors: Victor Boris Sapozhnikov, Taras Grigoryevich Pokhil, Mohammed Sharia Ullah Petwari
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Patent number: 9153250Abstract: An apparatus disclosed herein comprises a magnetically free layer and a bottom shield, wherein a first portion of the bottom shield substantially adjacent the free layer is pinned perpendicular to an air-bearing surface (ABS) of the apparatus and a second portion of the bottom shield not substantially adjacent the free layer is pinned parallel to the ABS of the apparatus.Type: GrantFiled: July 31, 2013Date of Patent: October 6, 2015Assignee: SEAGATE TECHNOLOGY LLCInventors: Victor Boris Sapozhnikov, Taras Grigoryevich Pokhil, Mohammed Sharia Ullah Patwari
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Publication number: 20150243305Abstract: An apparatus comprising a base shield, a sensor stack, and a base seed layer separating the base shield from the sensor stack. The base seed layer has a base coupled seed section that is coupled with the base shield, and a base uncoupled seed section that is uncoupled with the base shield, wherein the base uncoupled seed section covers a base window surrounding the sensor stack.Type: ApplicationFiled: March 3, 2015Publication date: August 27, 2015Inventors: Victor Boris Sapozhnikov, Taras Grigoryevich Pokhil, Mohammed Sharia Ullah Petwari
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Publication number: 20150213815Abstract: Implementations disclosed herein provide for an apparatus, comprising a synthetic antiferromagnetic reader structure, wherein total moment of a pinned layer is substantially greater than total moment of a reference layer. In one implementation, the pinning strength of the pinned layer is substantially reduced.Type: ApplicationFiled: January 29, 2014Publication date: July 30, 2015Applicant: Seagate Technology LLCInventors: Victor Boris Sapozhnikov, Taras Grigoryevich Pokhil, Mohammed Sharia Ullah Patwari
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Patent number: 8970994Abstract: An apparatus comprising a base shield and a sensor stack, wherein the base shield is separated from the sensor stack via a first soft magnetic layer that is magnetically decoupled form the base shield.Type: GrantFiled: July 29, 2014Date of Patent: March 3, 2015Assignee: Seagate Technology LLCInventors: Victor Boris Sapozhnikov, Taras Grigoryevich Pokhil, Mohammed Sharia Ullah Petwari
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Publication number: 20150036245Abstract: An apparatus disclosed herein comprises a magnetically free layer and a bottom shield, wherein a first portion of the bottom shield substantially adjacent the free layer is pinned perpendicular to an air-bearing surface (ABS) of the apparatus and a second portion of the bottom shield not substantially adjacent the free layer is pinned parallel to the ABS of the apparatus.Type: ApplicationFiled: July 31, 2013Publication date: February 5, 2015Applicant: Seagate Technology LLCInventors: Victor Boris Sapozhnikov, Taras Grigoryevich Pokhil, Mohammed Sharia Ullah Patwari
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Publication number: 20140334042Abstract: An apparatus comprising a base shield and a sensor stack, wherein the base shield is separated from the sensor stack via a first soft magnetic layer that is magnetically decoupled form the base shield.Type: ApplicationFiled: July 29, 2014Publication date: November 13, 2014Inventors: Victor Boris Sapozhnikov, Taras Grigoryevich Pokhil, Mohammed Sharia Ullah Petwari
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Publication number: 20140254047Abstract: An apparatus comprising a base shield and a sensor stack, wherein the base shield is separated from the sensor stack via a first soft magnetic layer that is magnetically decoupled form the base shield.Type: ApplicationFiled: March 8, 2013Publication date: September 11, 2014Applicant: SEAGATE TECHNOLOGY LLCInventors: Victor Boris Sapozhnikov, Taras Grigoryevich Pokhil, Mohammed Sharia Ullah Patwari
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Patent number: 7684150Abstract: The present invention relates to a head having an air bearing surface for confronting the surface of a storage medium. The head includes a first pole that is spaced apart from a second pole. At least one non-magnetic spacer is positioned between the first pole and the second pole such that the first pole is magnetically decoupled from the second pole. In a further aspect, one or both of the first pole and the second pole can be elliptical in shape.Type: GrantFiled: June 30, 2004Date of Patent: March 23, 2010Assignee: Seagate Technology LLCInventors: Taras Grigoryevich Pokhil, Nurul Amin, Steven Paul Bozeman, Steven Albert Kalderon, Andrzej Adam Stankiewicz, Ned Tabat, Pu-Ling Lu, Johannes Van Ek, Janusz Jozef Nowak, Patrick Joseph Ryan
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Patent number: 6807031Abstract: A transducing head includes at least three magnetic layers. At least two of these magnetic layers function as shields of a reader portion of the transducing head, and at least one of these magnetic layers functions as a pole of a writer portion of the transducing head. Importantly, at least one of the three magnetic layers is formed of a thin film structure having a first and a second ferromagnetic layer, a nonmagnetic spacer layer, and a bias layer. The spacer layer is positioned between the first and the second ferromagnetic layers. The bias layer is positioned adjacent the first ferromagnetic layer. The second ferromagnetic layer has a thickness-magnetic moment product substantially equal to a thickness-magnetic moment product of the first ferromagnetic layer. An easy axis of the second ferromagnetic layer is substantially parallel to an easy axis of the first ferromagnetic layer.Type: GrantFiled: July 3, 2002Date of Patent: October 19, 2004Assignee: Seagate Technology LLCInventors: Declan Macken, Gavin Brinkley, Taras Grigoryevich Pokhil, Alexandar Mikhailovich Shukh, Martin Louis Plumer
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Patent number: 6762915Abstract: A magnetoresistive stack for use in a magnetic read head has a plurality of layers including a ferromagnetic free layer, a ferromagnetic pinned layer, and an antiferromagnetic pinning layer. The pinned layer and pinning layer each have a greater number of structural grains than the free layer, which decreases a fluctuation of magnetization in the magnetoresistive stack without decreasing a spatial resolution of the magnetoresistive stack.Type: GrantFiled: January 25, 2002Date of Patent: July 13, 2004Assignee: Seagate Technology LLCInventors: Taras Grigoryevich Pokhil, Olle Gunnar Heinonen, Chunhong Hou
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Publication number: 20040021985Abstract: A magnetic recording head having an air bearing surface for confronting a surface of a rotating disc and comprising a pole tip and a generally rounded and substantially planar body attached to the pole tip is disclosed. The width of the pole tip defines a track width of data written to the rotating disc. The generally rounded shape of the top pole body is such that top pole magnetization gradually changes its direction and follows the edges of the body. Further, the pole tip has low remanence, gradual spin structure and no domain walls formed near the pole tip.Type: ApplicationFiled: December 4, 2002Publication date: February 5, 2004Applicant: Seagate Technology LLCInventors: Taras Grigoryevich Pokhil, Ned Tabat, Martin L. Plumer, Steven P. Bozeman, Nurul Amin
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Publication number: 20030214764Abstract: A magnetoresistive sensor having two free layers with shape anisotropy induced magnetic alignment is disclosed. The magnetoresistive sensor includes a first ferromagnetic free layer having a first quiescent state magnetization direction. The magnetoresistive sensor also includes a second elongated free layer having a second quiescent state magnetization direction and positioned such that the first quiescent state magnetization direction is generally orthogonal to the second quiescent state magnetization direction. Further, a portion of the second ferromagnetic free layer overlaps a portion of the first ferromagnetic free layer proximal to an air bearing surface to form a v-shape. A nonmagnetic spacer layer is also positioned between the first ferromagnetic free layer and the second ferromagnetic free layer.Type: ApplicationFiled: November 26, 2002Publication date: November 20, 2003Applicant: Seagate Technology LLCInventors: Victor Boris Sapozhnikov, Taras Grigoryevich Pokhil, Olle Gunnar Heinonen, Janusz Jozef Nowak
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Publication number: 20020181164Abstract: A transducing head includes at least three magnetic layers. At least two of these magnetic layers function as shields of a reader portion of the transducing head, and at least one of these magnetic layers functions as a pole of a writer portion of the transducing head. Importantly, at least one of the three magnetic layers is formed of a thin film structure having a first and a second ferromagnetic layer, a nonmagnetic spacer layer, and a bias layer. The spacer layer is positioned between the first and the second ferromagnetic layers. The bias layer is positioned adjacent the first ferromagnetic layer. The second ferromagnetic layer has a thickness-magnetic moment product substantially equal to a thickness-magnetic moment product of the first ferromagnetic layer. An easy axis of the second ferromagnetic layer is substantially parallel to an easy axis of the first ferromagnetic layer.Type: ApplicationFiled: July 3, 2002Publication date: December 5, 2002Applicant: Seagate Technology LLCInventors: Declan Macken, Gavin Brinkley, Taras Grigoryevich Pokhil, Alexander Mikhailovich Shukh, Martin Louis Plumer